Mechanical vibrator.



PATBNTED JUNE 11, 1907 E. P. WARD & A. H. HERRON.

MECHANICAL VIBRATOR,

wnmulon FILED APE.16,1908.

lNVENTORS EDGAR P WRRD AL H. HERRON.

W T-fvs UNIT STATES PATENT GEEK/ l.

EDGAR P. WARD AND .A-IJ H. HERRON, OF ST. LOUIS, MISSOURI.

MECHANlCAL VlBFlAT-DR.

Specification oi Letters Patent.

Patented June 11, 190?.

Application filed April 16, 1906. Serial No- 312,000.

To all whom it may concern/.-

Be it known that we, EDGAR P. Warm and AL ll. Hermon, citizens of the United States, and residents of St. Louis, Missouri, have invented certain new' and. useful lin- 'n'ovcinents in Mechanical Vibrators, of which the following is a specilicati\'m containing a full, clear, and exact-diwription,

reference being had to the accompanying drawings, forming a part hereof.

()ur invention relates generally to a mechanical viln'ator, and more partimilarly to an instrument for mechanically applying vibratory massage treatment to the skin and scald.

"lie object of ourinvention is to provide a simple and inexpensive instrument for ap plying; vibratory massage treatment, and which is easily operated by any motor pro ducing a rotary motion, and which instrun'ient can be easily and quickly adjusted so as to vary the strokeof the applicator which contacts directly with the skin or scalp.

To the above purposes, our lllVifJltlOll consists of certain novel features'of construction and arrangement of parts, which will be hereinafter more fully set forth, pointed out in our claims, and illustrated in the accompanying drawings, in which 1-- Figure 1 is a side elevation of an instrument of our improved. construction; Fig. 2 is a vertical section taken longitudinally th r ugh the forward portion of the instrument; Fig. 3 is a horizontal section taken on the line 3 3 of Fig. 2; Fig. i is a cross section taken on the line 4-4 of Fig. 2.

In the construction of the instrument as shown, 1 designates a suitable housing which incloses a small electric motor, (not shown,) and secured to said housing is a suitable handle 2 by means of which the instrument is manipulated.

3 designates the motor shaft on which is lixed a disk 4, and formed in the front face thereof, slightly to one side of the motor shaft 3 is a recess 5.

6 designates a bracket which is preferably formed in two parts, and. which is lined to and extends forwardly froin the motor casin; l.

Formed integral with the interior of this bracket 6, at the forward end thereof, are the oppositely arranged lugs 7, in which are. formed bearings 8.

U designates a tubular socket which is located in the forward end of the bracket 6, and formed integral with the central portion of said socket are the oppositely anxangrd out-- wardly projecting trunnions it), which operate in the bearings 8. The forward portion of this socket 9 is providedwith the longitudinally extending 'slots l 1. hand the exterior of the forward end of said socket is screw threaded, as indicated by 12. Seated upon this screw threaded portion of the socket l) a nut l3. Formed intc rral with the sides of the socket i), at the center thereof, and at right ai'igles to the trnnnii'n'is 10, are the outwardly projectii'ig 'tru nions l4. Pivotally mounted on said lrunnions are the forward ends 15 of a bifurcated lever 16, the rear end of which is loosely sealed in the recess 5.

Arranged for longitudinal adjustment in the socket 9 is a stern 17, in the forward end of which is formed a screw threaded recess 18. An applicator head ll), preferably in the form of a small spherical body is provided with a screw threaded shapk 20, which seated in the screw threaded recess 18.

In assembling our improved tool for use, the stem 17 with the applicator 19 at the outer end thereof is inserted in the slotted forward end of the socket 9, after the nut 13 has been loosened thereon, and when said" stem is properly positioned in said socket, the

nut 13 tightened to rigidly ix said stein in said socket. The handle 2 is now manually engaged, and when the motor is started, the disk 4 cnrricd hy the forward end of the motor shaft 3 will rapidly rotate, and as a result the bifurcated lever 16 is actuated, and in turn the socket 9 is oscillated upon its trun nions 10 which OPOI'tl-U' in the hearings 8, and this oscillation necessarily imparts a corresponding motion to the applicator 19.

The stroke or length of movement of the applicator )9 depends on the location of the stern 17 in the socket 9, and by loosiming the nut l 3,tlie-stc1ncanbc acj usl ed longitudinally in the socket so as to increase or diminish the length of stroke of said applicator.

The rear end of the lever 16 operates freely in the recess 5 with very little friction, and the u'ioveinent of the trunnions 10 in the bearings S is slight, so that very little friction results in the actuation of our improved vi-.

llO

eeeent wee/(Hy arranged aperture formed in the e L said disk, in tubular socket journaled Elation in the forward end of the frame outer end 01 which socket is 10ngitudi y slotted and exteriorly serew threaded, a

I pivotally 'conneeted so the socket at r t t-0 the hue of osclllamon thereoh 2 m wlth smd yoke and pmJeetmg therefrom into the aperture in e stem arranged in the forward end.- of he socket, an a-ppiicato'r carried by said stem, and a 100k nub arranged on the screw threaded. end of the socket; substantially as 1n testlmony whereof, We have signed our names to thig, specification, in presence of two subscribing Witnesses.

EDGAR P. WARD. AL H. HERRON.

. SMITH, I HARRINGTON. 

